Thumb-hole machine.



F. GRAFFENBERGER.

. THIUMB. HOLE MACHINE.

I APPLICATION FILED MAR.1, 1915. 1,241,506. v Patented 001;. 2,1917.

3 SHEETS-SHEET l.

Wrl-tngdjaed': Invemfiqfl W4 P l F. GRAFFENBERGER.

THUMB HOLE MACHlNE.

APPLICATION FILE-D MAR. .1. 1915.

Patented Oct. 2, 1917.

3 SHEETS-SHEET 3.

1 0106111707 J i f g f 7 MM,

V B y Wit 8619615 W mm 6 FTQ.

FRIEDRICH GRAFFENBERGER, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO A. GEO. SCHULZ CO., 01? MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

THUMB-HOLE MACHINE.

Specification of Letters Patent.

Patented Oct. 2, 191?.

Application filed March 1, 1915. Serial No. 11,358.

To all whom it may concern:

Be it known that I, FRIEDRICH GRAEFEN- BERGER, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Thumb-Hole Machines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

This invention relates to machines for cutting thumb or finger holes or notches in the edges of paper boxes, covers or the like.

Its main objects are to facilitate the adjustment of the machine for operating on boxes, covers or the like of different shapes and sizes, and for cutting holes or notches of dilferent sizes; toinsure and facilitate accurately positioning the boxes, covers or the like in the machine and thereby prevent mutilation of the stock or imperfect Work; to facilitate removing the punches from the machine for sharpening, renewing or changing them; and generally to improve the construction and operation of machines of this class.

The invention consists in the construction, arrangement and combination of parts as hereinafter particularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts in the several figures. i

Figure 1 is a plan view of a machine embodying the invention, parts being broken away; Fig. 2 is a vertical longitudinal section of the machine on the line 22, Figs. 1 and 3; Fig. 3 is a vertical cross section on the line 33, Fig. 1; Fig. 41 is a similar section on the line 4l4, Fig. 1; Fig. 5 is a sectional view similar to Fig. 4, showing the guard plate and punch guide detached and separated from each other and from the cam thrust bearing; and Fig. 6 is a longitudinal section on the line 6-6, Fig. 5.

The horizontal frame or bed 1, of the machine, which is supported at the ends by leg sections or standards 2, is formed or provided with parallel ways 3, and a longitudinal opening between the ways. A rotary shaft 4: is mounted below, midway between and parallel with the ways 3, in bearings 5, on the standards 2.

Cams 6, having oblique peripheral grooves, are splined on and adjustable lengthwise of the shaft d, and are formed or provided at their inner ends with extended journals 7. The journals 7 are fitted in thrust bearings 8, and are held against lengthwise movement therein by nuts 9 threaded on the ends of the journals and fastened in adjusted position thereon by set screws 10. The thrust bearings 8 are adjustably clamped or fastened with punch guides 11 located above and parallel therewith and in alinement with each other, to the ways 3, by bolts 12. Dies 13, are at tached by screws or otherwise, to the inner ends of the guides 11 in alinement therewith, the ends of the guides being cut away on the upper sides next to the dies, as shown in Figs. 2 and 6, to receive the opposite sides of boxes or covers in which thumb holes or notches are to be cut, as indicated by dotted lines in Fig. 2. The opposite sides of the openings between the dies and guides are beveled or rounded above the openings in the dies to facilitate insertion of the sides of the boxes or covers therein. Cross heads 14, fitted to reciprocate on the ways 3 over the cams 6, are provided with vertical pins 15, secured therein by set screws 16, or other means, and the lower ends of these pins which project into the cam grooves, are provided with rollers 17. Punches l8, fitted in the guides 11 and dies 13, are partially cut away on the under side at their outer ends and provided with vertical holes which are removably fitted on the upper ends of the pins 15.

The cams 6 and cross heads 14 are covered and protected by flanged guard plates 19, which are detachably fastened by the bolts 12 to the punch guides 11. Accurate positioning of the boxes in the machine for the proper operation thereon of the punches is facilitated, and mutilation and in ury of the stock, is prevented by outside gages 20 and inside gages 21, as shown in Figs. 1 and 3. The gages 20, resting on the bed 1, are formed or provided with stems 22, which are adjustably fastened by set screws 23 in brackets 24, attached to and extending upwardly from the front and rear sides of the bed. The inside gages 21 consist of L- shaped bars or rods fitting into the corners of the boxes and having squared stems or shanks which are clamped by screws 24 and adjustable lengthwise in channel bars 25, which in turn are adjustably clamped by screws 26 and cross bars 27 on the ways 3. The channel bars 25 are longitudinally split through their ends, as shown in Fig. 1, to enable them to be tightly clamp-ed upon the stems or shanks of the gages 21. The several gages are beveled or rounded at the ends presented toward the boxes, as shown in Fig. 3, to facilitate entering the box flanges between them, indicatedby dotted lines in Fig. 1. The cam shaft a may be rotated by any suitable connection with a motor or power shaft, as by means of a pulley 28.

In the operation of the machine, the cams, punches and dies and the gages having been properly adjusted, the boxes are placed by the operator one at a time with their flanges downward over the inside gages 21 and be-v tween the outside gages 20, as indicated by dotted lines in Fig. 1. The side flanges are thus caused to enter the flaring openings be.- tween the inner ends of the punch guides 11 and the dies 13, and are held in proper position for the operation ofthe punches 18, which by the rotation of the cams 6 are thrust toward each other into the dies 13, simultaneously cutting thumb holes or notches in the box, and are then withdrawn from the dies, the boxes being removed and replaced by others one after another, while the punches are withdrawn. The cams are rotated at such a rate of speed that a box can be removed and another inserted its place by a skilful or experienced operator, while the punches are withdrawn between the successive advance movements thereof, but in case a box is not accurately or completely positioned for the operation thereon of the punches when they advance, it will not be mutilated or injured, since the gages 2 and 21 prevent it from being inserted into the openings between the punch guides 11 and the dies 13 into the paths of the punches, except in proper position. If the punches should advance before the box is squarely seated on the bed 1, the holes or notches will at most, be imperfectly or partially out in the sides, and may be completed on the next advance movement of the punches, without mutilation or injury of the stock. v i

The machine is readily and quickly adjusted to operate on boxes of different SiZQS or widths by simply loosening the bolts 12 and then shifting the cams 6 bodily with their t rust bearing and the gu d .1 with the cross heads 14: and punches 18, to.- wardor rom each ther, d n fastening them in their adjusted position by tight.- ening the bolts 12. The gages 20 and 21 are corrtspondingly adjusted. For boxes of the Same ength but of diff r n Wid hs, the in side gages 21 are adjusted laterally or lengthwise of the cam shaft by loosening the clamping screws 26 and then shifting the clamping bars 25. and 27 toward or from each other on the ways 3, the screws 26 be ing finally tightened to hold them in their shifting the stems 22 0f the stops in or outhrough the rackets2 l.

The punches 18 with their guides ll and the di s 13 may be read ly removed for sharpening the punches or replacing them and the guides and dies with others for cutting holes or notches of; different forms or sizes, by simply emoving the bolts 12, thus permittingthe removal and separation of the guides 11,,pu110hes 18, dies 13 and guards 1.9, as shown in Figs. 5 and 6, without disturbing other parts or adjustments of the machine.

Various modifications in the construction and arrangement of parts of the machine may be made without departure from the p inciple and op o t e invention as efined in t efollowing c a s.

I claim:

1- In a thum hole mach ne the com nation with parallel w;ays,'of a rotary shaft parallel ith, said w y cams p necl on said shaft, thrust bearings for the cams,

punch guides, fastened with thecam bear- 'mgs to said ways parallel with-and ad ust.-

able lengthwise of the cam shaft, and dies attached to the inner ends of the punch guides in alinement and adjus b here with, and reciprocating punches fitted in said guides and having projections engaging with the cams. V

2. In a thumb hole machine the comb nation with a frame or bed having parallel ways, ofa rotary shaft parallel with said ways, cams mounted on and adjustable lengthwise of said shaft, punch guides detachably fastened to said ways parallelwith and adjustable lengthwise of the cam shaft, dies attached to the inner ends of thepulich guides in alinement and adjustable therewith, -reciprocating cross heads guided on said ways in engagement with said cams, and punches fitting said guides and dies and removably engaged with said cross heads. 1 I v 3. In a thumb hole machine the combination with a frame or bed having parallel ways, of a rotary shaft parallel with said ways, cams splined on and adjustable length:-

wise of said shaft, thrust bearings for the cams, punch guides removably clamped with said bearings to said ways parallel with the cam shaft and adjustable lengthwise thereof with the cams, dies attached to the inner ends of said guides,reciprocating cross heads guided on said ways in engagement with the cams, and punches fitting in said guides and dies and rem-ovably engaged with said cross heads. 4. In a thumb hole machine the combination with a frame or bed having parallel ways, of a rotary shaft parallel with said ways, cams splined on said shaft, thrust bearings engaging the cams, punch guides removably clamped with said bearings to said ways parallel with the cam shaft, dies attached to the inner ends of the guides, reciprocating cross heads guided on said ways in engagement with the cams, punches fitting in said guides and dies and removably connected with the cross heads, and guards detachably fastened to the punch guides and extending over and protecting the cams and cross heads.

5. In a thumb hole machine the combination with a frame provided with parallel ways, of punch guides adjustable toward and from each other on said ways and provided at their inner ends with'dies, punches fitted in said guides and dies, means for actuating said punches, and gages adjustable transversely to and lengthwise of said ways and adapted to fit into the corners of a box and determine the proper position of the box for the operation of the punches.

6. In a thumb hole machine the combination with a frame provided with parallel ways, of punch guides adjustable toward and from each other on said ways and provided at their inner ends with dies, punches fitting in said guides and dies, means for operating the punches, and L-shaped internal box-corner gages mounted on said ways and adjustable lengthwise thereof and transversely thereto.

7. In a thumb hole machine the combination with a frame provided with parallel ways, of punch guides adjustable toward and from each other on said Ways and provided at their inner ends with dies, reciprocating punches fitting in said guides and dies, means for operating the punches, channel bars having longitudinally split ends provided with clamping screws, clamping bars connected by screws with the channel bars and clamped therewith on said ways transversely thereto, and box gages having their shanks clamped in the split ends of the channel bars and adjustable lengthwise therein.

8. In a thumb hole machine the combination with a frame provided with parallel ways, of punch guides adjustable toward and from each other on said ways and provided at their inner ends with dies partially separated therefrom on their upper sides by flaring transverse openings, reciprocating punches. fitting in said guides and dies, means for operating said punches, internal box gages having rounded ends adjustable transversely to and lengthwise of the guides, and opposing external gages having rounded ends adjustable toward and from each other transversely to said ways.

In witness whereof I hereto afiix my signature in presence of two witnesses.

FRIEDRICH GRAFFENBERGER.

Witnesses:

CHAS. L. Gross, CHAS. EGGERS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

